In September 2020, Thomas Piggott published an article in the Journal of Clinical Epidemiology entitled “Supporting effective participation in health guideline development groups: The Guideline Participant Tool” (https://www.jclinepi.com/article/S0895-4356(20)31100-8/fulltext). Effective participation in guideline development groups or development groups is crucial for guideline success, yet little guidance exists for members of these groups. The article pointed out that the Guideline Participant Tool (GPT) support effective participation in guideline groups, in particular those using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) approach.